myocardial bridging
Congenital coronary anomaly where a segment of epicardial coronary artery runs intramurally through the myocardium.
Full Definition
Myocardial bridging is a congenital coronary anomaly in which a segment of an epicardial coronary artery takes an intramyocardial course, becoming 'bridged' by overlying myocardial fibers. This most commonly affects the left anterior descending artery. During systole, the bridged segment may be compressed by the surrounding myocardium, potentially causing ischemia. While often asymptomatic, myocardial bridging can be associated with chest pain, arrhythmias, and rarely sudden death, particularly in young athletes. The condition is typically diagnosed through coronary angiography or CT angiography, showing characteristic systolic compression of the affected vessel.
Usage
Usage note: Distinguish from external coronary compression; most commonly affects the LAD.
In Context
- "Autopsy revealed significant myocardial bridging of the LAD with 80% systolic compression." — Forensic pathology report
- "The angiogram demonstrated classic myocardial bridging with milking effect during systole." — Cardiac catheterization report